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ADS5541IPAPR 数据表(PDF) 27 Page - Texas Instruments |
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ADS5541IPAPR 数据表(HTML) 27 Page - Texas Instruments |
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27 / 37 page ![]() www.ti.com Production Data ADS5541 SBAS307C – MAY 2004 – REVISED FEBRUARY 2007 The timing characteristics of the digital outputs To use the input clock as the data capture clock, it is change for sampling rates below the 105MSPS necessary to delay the input clock by a delay, td, that maximum sampling frequency. Table 5 and Table 6 results in the desired setup or hold time. Use either show the setup, hold, and input clocks to output data of the following equations to calculate the value of tD. delays, and rise and fall times for different sampling Desired setup time = tD– tSTART frequencies with the DLL on and off, respectively. Desired hold time = tEND – tD Table 7 and Table 8 show the values of various timing parameters for lower sampling frequencies, both with DLL on and off. Table 5. Timing Characteristics at Additional Sampling Frequencies (DLL ON) tSU (ns) tH (ns) tSTART (ns) tEND (ns) tR (ns) tF (ns) fS (MSPS) MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 80 2.8 3.7 2.8 3.3 0.5 1.7 5.3 7.9 5.8 6.6 4.4 5.3 65 3.8 4.6 3.6 4.1 –0.5 0.8 5.3 8.5 6.7 7.2 5.5 6.4 Table 6. Timing Characteristics at Additional Sampling Frequencies (DLL OFF) tSU (ns) tH (ns) tSTART (ns) tEND (ns) tR (ns) tF (ns) fS (MSPS) MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 80 3.2 4.2 1.8 3 3.8 5 8.4 11 5.8 6.6 4.4 5.3 65 4.3 5.7 2 3 2.8 4.5 8.3 11.8 6.6 7.2 5.5 6.4 40 8.5 11 2.6 3.5 –1 1.5 8.9 14.5 7.5 8 7.3 7.8 20 17 25.7 2.5 4.7 –9.8 2 9.5 21.6 7.5 8 7.6 8 10 27 51 4 6.5 -30 -3 11.5 31 2 284 370 8 19 185 320 515 576 50 82 75 150 Table 7. Timing Characteristics at Additional Sampling Frequencies (DLL ON) CLKOUT CLKOUT CLKOUT Jitter, Peak-to-Peak Input-to-Output Clock Delay tRISE (ns) tFALL (ns) tJIT (ps) tPDI (ns) fS (MSPS) MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 80 2.5 2.8 2.1 2.3 210 315 3.7 4.3 5.1 65 3.1 3.5 2.6 2.9 260 380 3.5 4.1 4.8 Table 8. Timing Characteristics at Additional Sampling Frequencies (DLL OFF) CLKOUT Jitter, CLKOUT CLKOUT Peak-to-Peak Input-to-Output Clock Delay tRISE (ns) tFALL (ns) tJIT (ps) tPDI (ns) fS (MSPS) MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX 80 2.5 2.8 2.1 2.3 210 315 7.1 8 8.9 65 3.1 3.5 2.6 2.9 260 380 7.8 8.5 9.4 40 4.8 5.3 4 4.4 445 650 9.5 10.4 11.4 20 8.3 9.5 7.6 8.2 800 1200 13 15.5 18 2 31 52 36 65 2610 4400 537 551 567 27 Submit Documentation Feedback |
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